Mailing envelope



FIG. 1 is a front perspective view of a mailing envelope showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a rear elevational view showing the flap in an open condition;

FIG. 4 is a top plan view thereof showing the flap in an open condition; and

FIG. 5 is an end view elevation of FIG. 1, the opposite side being identical to the side shown. 

The ornamental design for a mailing envelope, substantially as shown and described. 